Juvenile ossifying fibroma (JOF) is a rare fibro-osseous neoplasm and it is defined as a variant of the ossifying fibroma that arises within the craniofacial bones in individuals under 15 years of age. These lesions tend to be discovered on routine radiographic examination. It is usually asymptomatic, achieving a large size and exhibiting aggressive behaviour. Two histologic patterns are classically described: (1) trabecular and (2) psammomatoid. Because of this lesion's aggressive nature and high recurrence rate, early detection and complete surgical excision are essential. Reported here is a case of a massive juvenile ossifying fibroma of the maxilla in a 13-year-old female child.